This is the 522nd most frequent Serbian word.
неких
"Some" or "certain" (genitive plural form).
Here, 'неких' is used as a quantifier to express an approximate amount or quantity.
Ја сам позван на неких петнаест минута.
I was invited for some fifteen minutes.
Here, 'неких' is used to imply the presence of certain unspecified individuals.
Видео сам неких интересантних људи на забави.
I saw some interesting people at the party.
Here, 'неких' suggests an unspecific and minor quantity of the mentioned items.